| January 21 | Winter Scientific Meeting, Chicago area |
| January 31 | Last day to register for Hosta College Last day of early registration for the AHS 2012 Convention |
| March 16-17 | Great Lakes Hosta College, Piqua, Ohio |
| May 19 | Work Day at Hidden Lake Gardens, Tipton, Michigan |
| June 2 | Ed Elsager Hybridizers' Group, Matthaei Gardens, Ann Arbor |
| June 13-16 | AHS National Convention, Nashville, Tennessee |
| June 22-24 | Great Lakes Region Tailgate Weekend, West Michigan area |
| June 30 | MHS Garden Walk, Saginaw area |
| July 14 | MHS Hosta Show and Sale, East Lansing |
| July 28 | Ed Elsager Hybridizers' Group, Matthaei Gardens, Ann Arbor |
| August 26 | Annual Meeting and Work Day at Hidden Lake Gardens, Tipton, Michigan |
| November 3 | Ed Elsager Hybridizers' Group, Matthaei Gardens, Ann Arbor |